How to remove Windows 7 and ubuntu 15.04?

The computer has windows 7 and ubuntu 15.04, at startup, I choose what OS to run. Fully decided now to remove windows 7 and ubuntu 15.04 and put on a computer is pure ubuntu 16.04. But the question asked how to remove it all? There is 2 partition drive C where is windows 7 and D where are my files.
July 8th 19 at 12:07
3 answers
July 8th 19 at 12:09
Format the partition with junk Axles.
But not data.

The installer of the new operating system will offer you to format. You only need to choose what.
July 8th 19 at 12:11
Delete disk partition windows 7, ubuntu 15.04 and create new partitions to your liking.
I don't know in what section of the drive is Ubuntu - arlie_Terry20 commented on July 8th 19 at 12:14
: incidentally, I also - Concepcion.Walsh commented on July 8th 19 at 12:17
July 8th 19 at 12:13
The Ubuntu installer includes advanced features markup. On the step "installation Type"* select "Other"* this will allow you to delete and create the necessary sections. You can boot Ubuntu from the installation mode, and the mode of examination to see which section of which (where the data is, and where the system can compare them by numbers, label, size, free space), i.e. to protect themselves from removal of the desired section.

* - 16.04 I did not put the names of the items may vary.

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